Brake shoe



Ahg. 2 5, 1931. c rrfls I 1,820,490

BRAKE SHOE Filed July 5, 1928 7 reticulated metal used to bind thePatented Aug. 1931 v i. i f 11,820,490.

CLIFTON n. PETTIS, ORNEW'YORK-NLYQ BRAKE: snon Application filed July 5,

This invention relates broadly to the, man

ufacture of cast articles adapted to have a reinforcing means embeddedtherein. in a a predetermined position, and more-particu- 5 larly to themanufacture of brake shoes having strips of reticulated or expandedmetalinserted therein during the, casting opera'-.

' tion. .c

In themanufacture of brake shoes it is customary to provide a brake shoehaving chilled metal sections arranged-either at the ends of the brakeshoe or distributed throughout the length of the. shoe. Duev to thedifference in the characteristics ofchilled and unchilled iron it isdesirable in order to prevent the chilled sections from chipping andbreaking away that the chilled sections be bonded with the unchilledsections so that even if the chilled sections are cracked they will notbe displaced from the shoe. Such a brake shoe is disclosed in the patenttoJ. S. Thompson, 1,463,981, granted August 7th,

1923. Although the device disclosed in the Thompson patent provides ameans for bonding the chilled and unchilledfportions of the brake shoetogether, it does not provide any means for anchoring or connecting thebonded section of the shoe to the reinforcing shell of the shoe. Nordoes it provideanyineans for tying together the individual strips ofunchilled portions. V

Therefore, in a brake shoe constructed in accordance'with' the Thompsondisclosure if a chilled portion of the shoe cracks, it is temporarilyheld in place by "one of the reticulated metal strips, but if aftercontinued wear the metal strip itself breaks, the" cracked portion ofthe shoe will become displaced. In accordance with my invention I tiethe individual strips of reticulated metal together so that even if oneof the strips which supports a cracked portion of "the shoe shouldbreak,

' nevertheless the cracked portion will be held in place because theindividual stripslof ticulated metal are tied together;

In accordance with my invention I employ areinforcing shell or backingfor the shoe, the edges of the reinforcing shell being turned downwardlyand inwardly and ex- 1 9,28. jsiiai 'ub'; 230,36; I

In the drawings illustrat ng t embodiments of invention, i

chilled and t ending longitudinally j of" the shoe ,'So that "thedownwardly and inwardly extending edges not only bond together thechilled and unchilled portionsof the shoe,%but anchor them to thereinforeinglshell.

to; preferred Figurel is a top planview'of a b raketshoe embodying vinvention 1 Figure'i is an enlargedjsectionalviewtak 6 i h ne V]IV -ofigu 2 c i 5..

'Fisu w i s de jelev 'dnof' l dei shown in. Figure. 1, parts being sh0wnin 'Figurfefi the reinforci'ng'shellyfj c a 'info rci'ng shell havingfdifli'erently i turned down edges from those shown i n the preced Iiisdm il 2.; 1 Referring to I Figures l to 4 of the drawingsfithere isshowniareinforcing shell 1pm: I vided with the usual centrally "disposedat- 'taching lug 2 and pouringp e'ning 31-.

A 5sh0 n;in;Fi u e 3 4, the reinford when the shoe is cast'these edgesanchor the body offtheshoe 'to the reinforcing shell. The body '5 of theshoe is composed of a plurality of I chilled sections arranged adjacent"the ends, ofjthe shoe, the chilled sections being spacedhpart by aportion of unchilled ing shell :lSfPlTOVIClG Cl w th dowhwardly and vinwardly extending edges ASoarrangedthat metal. In th illustrative-,embb;di;nnt of the t Psi invention" shown in Figure 7 2 the" shoe is,pm;

but it will beebvious' that chilled sections 'vided-with achilledsection ateachend'only, i

may be arranged throughout the. whole;

sired. These chilled sections/are bonded together by a pluralityof'reticulated or eX- panded metal strips 7 embedded in the chilled andunchilled portions of the shoe. The

strips'of metal are tied-togetherbyany de- .siredmeans, for example, bytying them in a bundle with wires 8 which surround the strips. 7

By this arrangementthe chilled sections are bonded to the unchilledsections by two H superimposed reinforcing means which are,

length of the body portion ofthe shoe if de- 1- i first, the downturnededges 4 of the reinforcing shell and, second, by the reticulated wirestrips 7. In order to maintain the reticulated metal strips 7 in placeduring the casting 5 operation, and in order to still further bond thechilled and unchilled sections of the shoe to the reinforcing shell, atleast one of the reticulated strips 7 'is-bentiupwardlyc adjacent itsends as shown at 9 in Figure 2, or at inter- 10 mediate points as Wellif desired, so that its upper ends will contact withtheinnen sun-- faceof the reinforcing shell.

By this means when the metal is poured into the mold the reticulatedmetal strips are prevented from displacement" by floating: By bending upthe ends ofthe: stripsrasaatfi, it willbe seen that the strips-Tareanchored to the reinforcing shell;

In. Figure 5,. a slightly. difi'erent; form of reinforcingshellprovidedwith downwardly '1 andinwardly turnedfed'ges is shown.Otherwise, the brake shoe. is-siinil'ar to thatshown in Figu res 1" to r4..

From the above description it will he. un- 25 derstood that my inventionprovidesiaplit ral'ity of' means arrangedlin superimposed planes forbonding the chilledand unchill ed portions of the shoetorthe'reinforcing shell. Although I have descrihedindetail severalpreferred embodimentsof the invention; it is to he understood. that theinvention i'snot so limited but may be otherwise embodied withinthefscopeof the following claiinzl I claim-z. A brake shoe comprising abody portion and. a reinforcing shell, .thebody; portion ex- 1 tending,continously' throughout the. length of the shell and having' chilled.andcunchill'ed portions bonded together by reticulatedmetr alhstripswhich extendcontinuously. throughout the major portion of? the body andare embedded within the body, said shell having downwardly and inwardlyturned edgesfor anchoring the chilled. and unehilled portions tortheshell and. to each other,v at least one of the met'al strips having;itsjendsctnrned upwardly and contacting, with the shell in order to, tiethe strips and. chilled; and un+ chilled. portions to thevshelllIntestimony whereof: Lhavehereuntoset my handl CLIFTON D'.. BETTIS;

